Gun-sight



329-254. UR 193709478 5R lH". PAuLsoN. GUN SIGHT. y APPLICATION fiLEb1mm. 1920. 1,370,478. Patented Mar. 1, 1921y commessa?- mssranaaswsUNITED STTS PATNT FFIC.

GUN-SIGHT.

Specification of Letters Patent.

Patented Mar. 1, 1921.

Application led January 2, 1920. Serial No. 348,756.

To all 'whomzt may concern:

Be it known that I, HANS PAULsoN, a citizen of the United States,residing at Orting, in the countyof Pierce and State of Washington, haveinvented certain new and useful Improvements in Gun-Sights; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the s ame.

This invention relates to gun sights and more specifically to animproved adjustable sight for changing the trajectory of a gun on whichthis sight is mounted.

One object of this invention is to provide an improved sight whichcomprises a plurality of separate and independently adjustable indexingmembers on the manipulator or actuator, which members can be set andsecured in set position relative to the actuator, for indexing thesighting points position which 'corresponds to a predeterminedtrajectory of the gun.

A further object is to provide an 1mproved sight of this characterhaving an actuator provided with permanent markings or index lines whichare adjustable with relation to one another, so that these markings caneasily be arranged and re-arranged to suit different guns which havetheir front and rear sights spaced different distances, this featurealso enabling the adjustable rear sight to be placed on the gun, ordesirable part of the gun-stock, regardless of the distance between thisrear sight and the front sight.

Other objects and advantages will be specifically pointed out.or'implied inthe following detailed description and claims, inconnection with the accompanying drawings in whichi Figure 1 is aperspective view of a portion of a gun having my improved sight mountedthereon.

Fig. 2 is a side elevation of the sight de tached from the gun.

Fig. 3 is a central vertical sectional view, the section being takenalong the line 3-3 of Fig. 2.

Referring to these drawings in detail, in which similar referencecharacters correspond with similar parts, and in which the gun-stock 1is illustrated merely for the purpose of showing the application of myinvention, the attaching or connecting members 2 and 3 also being ofpreviously known construction, the invention consists in theconstruction and arrangement of parts hereinafter specifically describedas follows:

The main support or body member 4L is pivotally connected to the member2 by means of the member 8, and this main body member is formed with acylindrical bore 5 which extends through a cylindrical bearing 6, thelatter being provided with an axially parallel slot 7 which extends fromend to end of this cylindrical bearing. The body member 4 is alsoprovided with an annular flange 8 which surrounds the lower end of amanipulator or actuator 9. This actuator has a cylindrical outersurface, and its inner surface is screw-threaded from end to end. rlheannular inner surfaces of the screw threads are seated against androtatable on the outer surface of the tubular bearing 6 and the lowerend of this inember is slightly flared or flanged and engaged by theinwardly turned upper edge of the flange 8. Therefore, this member 9 isse.- cured against axial movement relative to the member 1, but can befreely rotated with relation thereto.

A seating member 10 is provided with a cylindrical shank 11 which isformed with teeth 12 that extend through the slot 7 into engagement withthe screw threads of the actuator 9, and therefore, when the actuator isrotated about the bearing 6, the sighting member 10 is raised orlowered, according to the direction in which the actuator is rotated.The sighting member may either be provided with an aperture or peep-hole13 or it may be provided with a notch or other form of sighting point.

Considered broadly, the structure described in the foregoing has beenpreviously known, and is not claimed by me except in combination withthe structure which will now be described as follows:

The actuator 9 is provided with an outwardly extending flange orshoulder 14 on which is seated any appropriate number of rings orindexing members 15, these members being superposed and being separatelyand independently rotatable around the cylindrical outer surface of theactuator 9. However, each ring 15 is provided with a set-screw 17 forsecuring it in an infinite number of different adjustments on theactuator. It should be understood, however, that it is not intended forthe rings 15 to have axial movement on the actuator except for thepurpose of placing them on the actuator, and when speaking of adjustmentof these rings, rotary adjustment is meant. Each ring 15 is providedwith one or more indexing points or lines 18 which may be brought intoregistration with one edge of an indexing element or arm 19, asillustrated by the indexing line whose ordinal is 4 in Fig. 2. Theindexing member of which the arm 19 is an element comprises a. ring 20with which this indexing arm 19 is preferably integral. This ring 2O istightly fitted on the outer surface of the iange 8, and it may besecured in this position by solder or other appropriate means (notshown). By thus securing the indexing member 19-20 in place, it can beremoved and replaced with comparative ease in the event its arm 19becomes bent or broken.

Referring now to Fig. 3, it will be seen that the indexing` arm 19extends from the bottom to the top of the series or set of adjustableindexing members 15 and is adapted to register with each of the indexinglines 18, either when t-he rings 15 are adjusted on the actuator, orwhen the actuator is turned on its bearing. Therefore, the stationaryindexing member 19-20 or its arm 19 may be considered a universalindexing member, being universal or common with respect to each of therings 15 and with respect to each of the indexing lines 18. In thisconnection, it is pointed out that although only one indexing line isillustrated on each ring 15, a plurality of such indexing lines may beprovided on each ring 15, for a purpose which will hereinafter beexplained.

In explaining` the operation and advantages of this device, it may beassumed that the device has been in use on a gun and located at adistance of three feet from the front sight, the indexing rings 15 beingadjusted according to this specified distance between the sights. It mayalso be assumed that the shank 11 is provided with indexing lines 21,each line 21 being adapted to register with the top of the bearing 6 forindicating the correct elevation of the sighting member 10 for thisspecified distance between the sights (three feet), the

spaces between the graduations or indexing lines 21 representing orcorresponding to one hundred yards, respectively, between the muzzle ofthe gun and the target. It may be assumed that the upper line 21represents the trajectory for hitting the mark at 100 yards or less, thenext lower one for 200 yards, the third for 300 yards, and that thefourth is registering with the top of the bearing 6 and indicates thatthe sight is set for 400 yards. The fourth ring 15 (from the bottom) hasits indexing line 18 in registry with the indexing arm 19, agreeing withthe fourth indexing line 21 (from the top) in its indication of thecorrect trajectory for 400 yards. Now it is obvious, that either theindexing lines 18 or the indexing lines 21 could be dispensed with, ifal1 guns had front and rear sights equally spaced, but such is not thecase, and therefore, the adjustable indexing elements 18 are necessaryin order that the sight can be made useful and accurate when applied toa gun having a greater or less distance (than three feet) between thefront and rear sights; it being obvious that the permanently spacedlines 21 cannot be changed because they are indented or scratched in thesurface of the shank 11, and if merely applied on the surface, so as tobe erased and changed in space, they are likely to become accidentallyerased and the sights thereby rendered use-less until these indexinglines are restored. Therefore, when the sight is changed from a gunwhich has its sight spaced three feet, to a gun which has its sightspaced two feet (for instance), the indexing lines 21 are used only toindicate the approximate elevation of the sight for a given distancebetween the gun and the target, and the rings 15 may be adjusted tobring their respective indexing lines into registry with the universalindexing member for indicating the correct or exact elevation of thesighting member for the given distances between the gun and the target.

1n setting the indexing member 15, having placed the sight on thegun-stock without regard to the distance between this rear sight and thefront sight, the rear sight is elevated to the approximate height forthe proper trajectory at 100 yards (for instance),and now the gun isaccurately aimed and fired at the target, and if the missile strikesbelow the target, it is known that the sighting member needs to befurther elevated, and on the other hand, if it strikes above the target,it is known that the sighting member needs to be lowered. After thustrying the gun until the accuracy of fire indicates that the sight isproperly elevated for one hundred yards, the lower ring 15 is adjustedby loosening the screws 17 and turning this lower ring until itsindexing line 18 registers with the arm 19. The gun is now aimed andfired at a target spaced two hundred yards therefrom, and the sightingmember is adjusted in the manner previously described for trial at onehundred yards. When the target shows that the sighting member isproperly elevated, the second ring 15 (from the bottom) is likewisechanged so that its indexing line registers with the arm 19. Likewise,each of the superposed rings are adjusted after the elevation of thesight has been determined by trial on a target at 300, 400, 500

OMETQl-WL and 600 yards respectively. It is to be understood that eachof the set screws 17 is to be tightened for securing its ring 15 infixed position on the actuator 9 when the respective rings 15 areadjusted to register with the universal indexing member.

Having set or adjusted the sight according to its accuracy in hittingthe target, it is obvious that when it is subsequently desired to lireon a target at 100 yards, it is only necessary to adjust the actuatorfor moving the sighting member to the approximate elevation and thenturning the actuator until the indexing line 18 of the lower ring 15registers with the universal indexing member. Likewise, when it isdesired to lire on a target at 200 yards, the actuator is turned untilthe sighting member is elevated to the approximate height Jfor 200yards, and the actuator is then turned to bring the indexing line 18 ofthe second ring (from Lthe bottom) into registration with the universalindexing member. Likewise, the third, fourth and fifth rings from thebottom are adjusted for bringing their indexing lines into registrationwith the universal indexing member.

It is to be understood that a greater or less number of rings may beemployed, and that the invention is not limited to the exactconstruction and arrangement of parts described and shown, but thatchanges may be made within the scope of the inventive ideas as impliedand claimed.

What I claim as my invention is:

1. In a gun-sight, a main support, a sighting member supported thereby,an actuator connected with the sighting member and operable to raise andlower the latter, a set of indexing members mounted on said actuatingmember and capable of adjustment independently of one another, and auniversal indexing member supported by said main support in suchposition that each of the indexin members of said set can be caused toreglster therewith by said adjustment on said actuating member.

2. In a gun-sight, a main support, a sighting member supported thereby,an actuator connected with the sighting member and operable to raise andlower the latter, a set of superposed rings each having an indexingpoint on its periphery, these rings being mounted for rotationindependently of one another on said actuator, a universal indexingmember supported by said main support in such position that the indexingpoint of each of said rings can be caused to register therewith byrotation of the rings on the actuator.

3. In a gun-sight, a main support, a sighting member including anupright shank and supported by said main support, an internally threadedactuator having its threads engaged with said shank and being rotatablefor raising and lowering the latter, a set of rings each having thereonan indexing point and being mounted for rotation on said actuator, auniversal indexing member in a position on said main support to registerwith each of said indexing points when the rings are rotated on saidactuator, and means carried by each ring to secure it in differentadjustments on said actuator.

4. In a gun-sight, a sighting member including an upright shank, aninternally threaded actuator having its threads engaged with said shankand being rotatable for raising and lowering the latter, a baseincluding an annular flange within which said actuator is ournaled, anindexing member comprising a sleeve and an arm extending laterally fromthe sleeve, said sleeve being fitted around said annular flange andsupporting said arm in an upright position, and a set of indexingmembers, each comprising one 0r more indexing points and being mountedon and rotatable with said actuator and separately adjustable withrelation to the latter and to one another, said arm being disposedadjacent to the paths of adjustment of the indexing member of said setand adapted to register with the said indexing points.

In testimony whereof I have hereunto set my hand.

HANS PAULSON.

